(CLARK COUNTY) - The capital murder trial of the Vanderburgh County man accused of killing his girlfriend's two children begins on Monday.

Jeffrey Weisheit's Clark County trial is expected to last three to five weeks, and on Friday, investigators are putting the finishing touches on their case.

It was back in April 2010 when Jeffrey Weisheit allegedly lit his girlfriend's home on fire, killing her two young children inside. Investigators say they're ready for this death penalty trial to finally get underway.

After three longs years, jury selection is set to begin Monday in Clark County.

Lt. Doug Daza with the Vanderburgh County Sheriff's Office says delays have left the victim's family in limbo and made this case expensive: more than $500,000 of taxpayer money going to Weisheit's defense.

Alyssa and Caleb Lynch were just eight and five-years-old when that fire took their lives. Lt. Daza is hoping years of hard work will help bring a conviction.